tools: psock_lib: harden socket filter used by psock tests
The filter added by sock_setfilter is intended to only permit packets matching the pattern set up by create_payload(), but we only check the ip_len, and a single test-character in the IP packet to ensure this condition. Harden the filter by adding additional constraints so that we only permit UDP/IPv4 packets that meet the ip_len and test-character requirements. Include the bpf_asm src as a comment, in case this needs to be enhanced in the future Signed-off-by:Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
79471b10
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